<html>
<meta http-equiv="x-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device--width,inital-scale=1.0">
<title>demo</title>
<link rel="stylesheet"   href="./css/xdl.css">
<script src="./js/login.js"></script>
</head>
<body>
    <div class="container">
        <div class="content">
            <div class="login_box">
                  <p class="longin_title"欢迎登陆></p>
                     <div class="innput_item">
        <div class="item_lable">用户名</div>
        <div class="item_content">
            <input id="usrname" type="text" placeholder="请输入用户名" >
            <span id="username_valid" class="input_valid">用户名合法</span>
            <span id="username_invalid" class="input_invalid">用户名不合法</span>
        </div>
    </div>
    <div class="input_item">
        <div class="item_lable">密码</div>
        <div class="item_content"><input id="password" type="password" placeholder="请输入密码"></div>
</div>
        </div>
        <div class="input_item">
         <input type="button" onclick="check()" volue="提交">
         <input type="button" value="重置">
        </div>
    </div>
    </div>
</div>
</body>
</html>
